Firepower FP 125 Operating Manual & Installation Manual page 20

FIREPOWER FP 125,135,165
Adjusting Regulator
Adjust control knob of regulator to the required flow rate, indicated on gauge dial. (Refer to Figure 3-2 and data charts. Approx. 20 CFH)
The gas flow rate should be adequate to cover the weld zone to stop weld porosity. Excessive gas flow rates may cause turbulence and
weld porosity.
Argon or argon based gas flow rates:
- Workshop welding: 20-30 CFH
- Outdoors welding: 30-40 CFH
Helium based or CO2 gas flow rates:
- Workshop welding: 30-40 CFH
- Outdoors welding: 40-50 CFH
NOTE!
All valves downstream of the regulator must be opened to obtain a true flow rate reading on the outlet
gauge. (Welding power source must be triggered) Close the valves after the pressure has been set.
Refer to section 4.15 for suggested gas / filler metal combinations.
NOTE!
The regulator/flowmeters used with argonbased and carbon dioxide shielding gases are different. The
regulator/flow meter supplied is for argon based shielding gases. If carbon dioxide is to be used a suitable
carbon dioxide regulator/flow meter will need to be fitted.
Two types of gas are generally used with Gas Metal Arc Welding (GMAW) of thin gauge sheet steel. A mixture of 75% Argon and 25%
Carbon Dioxide (CO2) is recommended, Carbon Dioxide (CO2) can also be used.
INSTALLATION
Figure 3-2: Adjusting flow rate. Illustration for Reference Only.
Art # A-07280
3-4 Manual 0-5123